533
FNCA52 TJSJ 120730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST WED AUG 12 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-122000-
SOUTHEAST COASTAL PLAINS-
330 AM AST WED AUG 12 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS
CHANCE PRECIP (%) 30 60 40
TEMP (24H TREND) 90 (+2) 75 (-2) 89
RH % (24H TREND) 59 (+3) 94 (+2) 49
WIND 20FT/EARLY(MPH) E 14 E 14 E 19 G27
WIND 20FT/LATE(MPH) E 16 E 14 E 21 G30
MIXING HGT(FT-AGL/MSL)4690 4310
TRANSPORT WND (MPH) E 17 E 24
VENT RATE (KT-FT) 70350 90510
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-122000-
SOUTHERN HILLS-
330 AM AST WED AUG 12 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS
CHANCE PRECIP (%) 40 60 40
TEMP (24H TREND) 88 (+4) 72 (-2) 87
RH % (24H TREND) 65 (-1) 99 (+3) 60
WIND 20FT/EARLY(MPH) E 12 E 14 E 16
WIND 20FT/LATE(MPH) SE 13 E 14 E 17
MIXING HGT(FT-AGL/MSL)5460 4950
TRANSPORT WND (MPH) E 16 E 24
VENT RATE (KT-FT) 76440 103950
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-122000-
NORTH COASTAL PLAINS-
330 AM AST WED AUG 12 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 70 70 20
TEMP (24H TREND) 90 (+3) 75 (-2) 90
RH % (24H TREND) 65 (-3) 99 (+2) 61
WIND 20FT/EARLY(MPH) E 13 E 14 E 18
WIND 20FT/LATE(MPH) E 20 E 13 E 20
MIXING HGT(FT-AGL/MSL)4840 5160
TRANSPORT WND (MPH) E 15 E 23
VENT RATE (KT-FT) 62920 103200
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-122000-
NORTHERN HILLS-
330 AM AST WED AUG 12 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 70 60 10
TEMP (24H TREND) 89 (+3) 72 (-2) 89
RH % (24H TREND) 67 (-1) 100 (+1) 62
WIND 20FT/EARLY(MPH) E 11 E 11 E 14
WIND 20FT/LATE(MPH) E 18 E 9 E 19
MIXING HGT(FT-AGL/MSL)5770 6090
TRANSPORT WND (MPH) E 14 SE 21
VENT RATE (KT-FT) 69240 109620
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-122000-
WEST COAST-
330 AM AST WED AUG 12 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 40 50 10
TEMP (24H TREND) 93 (+4) 75 (0) 92
RH % (24H TREND) 63 (0) 99 (+1) 62
WIND 20FT/EARLY(MPH) E 12 E 14 E 18
WIND 20FT/LATE(MPH) E 13 E 13 SE 19
MIXING HGT(FT-AGL/MSL)4680 5010
TRANSPORT WND (MPH) E 12 E 20
VENT RATE (KT-FT) 46800 85170
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-122000-
EASTERN INTERIOR-
330 AM AST WED AUG 12 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 50 60 40
TEMP (24H TREND) 89 (+4) 73 (-3) 88
RH % (24H TREND) 65 (-1) 100 (+3) 62
WIND 20FT/EARLY(MPH) E 13 E 16 E 18
WIND 20FT/LATE(MPH) E 14 E 16 E 17
MIXING HGT(FT-AGL/MSL)5360 4640
TRANSPORT WND (MPH) SE 17 E 23
VENT RATE (KT-FT) 80400 92800
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-122000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST WED AUG 12 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 50 50 40
TEMP (24H TREND) 84 (+4) 71 (-2) 84
RH % (24H TREND) 73 (-3) 100 (+1) 69
WIND 20FT/EARLY(MPH) E 12 E 13 E 16
WIND 20FT/LATE(MPH) E 12 E 13 E 16
MIXING HGT(FT-AGL/MSL)3420 4040
TRANSPORT WND (MPH) E 18 E 24
VENT RATE (KT-FT) 54720 84840
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-122000-
CENTRAL MOUNTAIN RANGE-
330 AM AST WED AUG 12 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 50 60 10
TEMP (24H TREND) 87 (+5) 69 (-3) 87
RH % (24H TREND) 70 (-3) 100 (+1) 63
WIND 20FT/EARLY(MPH) E 10 E 8 E 12
WIND 20FT/LATE(MPH) SE 10 E 6 E 13
MIXING HGT(FT-AGL/MSL)6400 6410
TRANSPORT WND (MPH) E 13 SE 20
VENT RATE (KT-FT) 70400 108970
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-122000-
CAYEY MOUNTAIN RANGE-
330 AM AST WED AUG 12 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 50 60 40
TEMP (24H TREND) 84 (+3) 72 (-1) 83
RH % (24H TREND) 74 (+1) 100 (0) 71
WIND 20FT/EARLY(MPH) E 11 E 12 E 14
WIND 20FT/LATE(MPH) E 12 E 12 E 14
MIXING HGT(FT-AGL/MSL)4140 4010
TRANSPORT WND (MPH) E 17 E 25
VENT RATE (KT-FT) 62100 88220
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-122000-
VIEQUES-
330 AM AST WED AUG 12 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 40 20
TEMP (24H TREND) 90 (+3) 79 (-1) 89
RH % (24H TREND) 60 (-3) 90 (+2) 58
WIND 20FT/EARLY(MPH) E 17 E 19 G26 E 21 G29
WIND 20FT/LATE(MPH) E 18 E 19 E 20
MIXING HGT(FT-AGL/MSL)3070 4150
TRANSPORT WND (MPH) E 18 E 24
VENT RATE (KT-FT) 49120 87150
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-122000-
CULEBRA-
330 AM AST WED AUG 12 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 30 10
TEMP (24H TREND) 90 (+3) 79 (-1) 90
RH % (24H TREND) 62 (-6) 94 (+4) 62
WIND 20FT/EARLY(MPH) E 17 E 20 E 23
WIND 20FT/LATE(MPH) E 18 E 19 G26 E 20
MIXING HGT(FT-AGL/MSL)3010 3950
TRANSPORT WND (MPH) E 18 E 24
VENT RATE (KT-FT) 48160 82950
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-122000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST WED AUG 12 2026
TODAY TONIGHT THU
CLOUD COVER MCLEAR PCLDY MCLEAR
PRECIP TYPE SHOWERS TSTMS SHOWERS
CHANCE PRECIP (%) 10 60 10
TEMP (24H TREND) 92 (+3) 75 (-2) 91
RH % (24H TREND) 59 (+2) 97 (+6) 54
WIND 20FT/EARLY(MPH) E 17 E 19 E 23 G32
WIND 20FT/LATE(MPH) SE 19 E 18 E 25 G34
MIXING HGT(FT-AGL/MSL)4910 4640
TRANSPORT WND (MPH) E 20 E 28
VENT RATE (KT-FT) 83470 111360
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-122000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST WED AUG 12 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS NONE
CHANCE PRECIP (%) 40 20 0
TEMP (24H TREND) 88 (+3) 78 (-2) 88
RH % (24H TREND) 64 (-5) 92 (+2) 63
WIND 20FT/EARLY(MPH) E 17 E 19 G26 E 23 G31
WIND 20FT/LATE(MPH) E 18 E 20 E 21 G29
MIXING HGT(FT-AGL/MSL)2820 3710
TRANSPORT WND (MPH) E 21 E 25
VENT RATE (KT-FT) 50760 81620
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-122000-
ST CROIX-
330 AM AST WED AUG 12 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS SHOWERS NONE
CHANCE PRECIP (%) 50 30 0
TEMP (24H TREND) 89 (+3) 78 (-2) 89
RH % (24H TREND) 66 (-2) 94 (+2) 63
WIND 20FT/EARLY(MPH) E 17 E 19 E 23
WIND 20FT/LATE(MPH) E 17 E 19 E 21
MIXING HGT(FT-AGL/MSL)3550 4180
TRANSPORT WND (MPH) E 24 E 28
VENT RATE (KT-FT) 74550 100320
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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